The diagram below shows a portion of the geologic time scale. Based on the time scale, it can be concluded that

A. animals appeared on Earth before flowering plants.
B. land animals created the first oxygen molecules.
C. flowering plants appeare on Earth before animals.
D. flowering plants created the first oxygen molecules.

Im not sure but I think A

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primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation: